Oxaziridine-Mediated Intramolecular Amination of sp3-Hybridized C−H Bonds
摘要:
We describe a new oxaziridine-mediated approach to the amination of sp(3)-hybridized C-H bonds. In the presence of a copper(II) catalyst, N-sulfonyl oxaziridines participate in efficient intramolecular cyclization reactions to afford a variety of piperidine and tetrahydroisoquinoline structures. The aminal intermediates provide a convenient functional handle for further elaboration of these structures, demonstrating the utility of this new methodology for the rapid construction of structurally complex nitrogen-containing heterocycles.
Organomanganese (II) reagents XVIII: Copper-catalyzed 1,4- addition of organomanganese chloride compounds to conjugated ethylenic aldehydes
作者:Gérard Cahiez、Mouad Alami
DOI:10.1016/s0040-4039(00)70698-8
日期:1989.1
Organomanganese chlorides react with β-mono or β,β-bisubstituted α,β-ethylenic aldehydes in the presence of a catalytic amount of copper chloride to give good yields of 1,4-addition products in THF at −30°C.
CELLULOSE DERIVATIVE AND PROCESS FOR PRODUCTION THEREOF, CELLULOSE RESIN COMPOSITION, MOLDED ARTICLE AND METHOD FOR PRODUCTION THEREOF, AND HOUSING FOR ELECTROCHEMICAL DEVICE
申请人:FUJIFILM Corporation
公开号:EP2295470A1
公开(公告)日:2011-03-16
A cellulose derivative having good thermal plasticity, strength, heat resistance and mold working suitability is provided.
The cellulose derivative is a cellulose derivative obtained from cellulose by substitution of hydrocarbyl groups ranging in carbon number from 1 to 7 and aliphatic acyl groups ranging in carbon number from 4 to 11 for at least part of the hydrogen atoms of hydroxyl groups contained in the cellulose.
CAHIEZ, GERARD;ALAMI, MOUAD, TETRAHEDRON LETT., 30,(1989) N2, C. 7365-7368
作者:CAHIEZ, GERARD、ALAMI, MOUAD
DOI:——
日期:——
Process for hydrogenation of conjugated diene polymer
申请人:——
公开号:US20040082727A1
公开(公告)日:2004-04-29
A process for hydrogenation of a conjugated diene polymer. The conjugated diene polymer in an inert organic solvent is brought into contact with hydrogen in the presence of a hydrogenation catalyst composition to selectively hydrogenate the unsaturated double bonds in the conjugated diene units of the conjugated diene polymer. The hydrogenation catalyst composition includes: (I) a titanium compound; (II) a compound represented by formula (II):
1
wherein L is a Group IVB element, R is C
1
-C
12
alkyl or C
1
-C
12
cycloalkyl, X can be the same or different and is C
1
-C
12
alkyl, C
1
-C
12
alkoxy, C
1
-C
12
cycloalkoxy, halogen, or carbonyl; and (III) a trialkylaluminum compound.
Hydrogenation catalyst composition and process for hydrogenation of conjugated diene polymer
申请人:Lin Fu
公开号:US20060041079A1
公开(公告)日:2006-02-23
A process for hydrogenation of an unsaturated polymer. The conjugated diene polymer in an inert organic solvent is brought into contact with hydrogen in the presence of a hydrogenation catalyst composition to selectively hydrogenate the unsaturated double bonds in the conjugated diene units of the conjugated diene polymer. The hydrogenation catalyst composition includes: (a) a titanium compound; (b) a compound represented by formula (II) or formula (III):
wherein L
1
is a Group IVA element, L
2
is a Group IVA element, R
3
is C
1
-C
12
alkyl or C
1
-C
12
cycloalkyl, R
4
is C
2
-C
12
alkyl or C
3
-C
12
cycloalkyl, and X
1
, X
2
, and X
3
can be the same or different and are C
1
-C
12
alkyl, C
1
-C
12
alkoxy, C
1
-C
12
cycloalkoxy, phenyl, or phenoxy; and (c) a trialkylaluminum compound.